KR200295951Y1 - Resistor for driving motor of airconditioner blower - Google Patents

Abstract

The disclosed contents reduce the size of the entire resistor by stacking the internal resistance of the resistor for controlling the fan driving speed between the insulating materials, increasing the line width by separating and stacking the resistor with a plurality of metal thin plates instead of a single plate, and increasing the temperature fuse. The present invention relates to a resistor for an air conditioner fan motor.

This air conditioner fan motor resistor is achieved by laminating resistors made of at least two metal thin plates. The resistors may form independent resistors of two separate thin plate-shaped second resistors 114 and third resistors 116, and independent resistors of only the first resistor 112 on another thin plate, and include three or more of them. It is a resistor made of a resistor of a laminated structure in which each is divided and forms a layer independently.

Since the resistor of such a resistor is divided into several pieces, the line width of the resistor of each thin plate is not only improved durability, but also the size of the resistor can be reduced, and also it is easy to prevent overheating and heat dissipation of a specific part. The temperature fuse can be assembled on the outside of the heat sink to provide a resistor that can simplify the resistor assembly structure.

Description

Resistor for driving motor of airconditioner blower}

The present invention relates to a resistor for an air conditioner fan motor for adjusting the rotational speed of a blower motor used in an air conditioning apparatus of a vehicle. In particular, a resistor made of a metal sheet is separated into at least two resistors, stacked together with an insulating material, and a temperature fuse is applied. A resistor for an air conditioner fan motor disposed outside the heat sink.

The following are known resistors for air conditioner fan motors.

1 is a perspective view of a conventional air conditioner fan motor resistor, Figure 2 is an exploded perspective view of a conventional air conditioner fan motor resistor, Figure 3 is a perspective view of another example of a conventional air conditioner fan motor resistor, Figure 4 is a conventional 7 is an exploded perspective view of another example of a resistor for an air conditioner fan motor, and FIG. 7C shows a resistor on a single plate of a resistor for a conventional air conditioner fan motor, and FIG. 12B is a diagram schematically showing a resistor implemented on a single plate of a resistor for a conventional air conditioner fan motor.

Resistor for a conventional air conditioner fan motor according to the drawings,

It consists of a connector part 20 for connecting to an air conditioning apparatus and a resistor part 10 in which a resistor 11 is incorporated.

The resistor unit 10 includes a heat sink 13 and a cover member 14 for dissipating heat from the resistor 11, and an insulating material attached to both sides of the resistor 11 to insulate the resistor 11. 12), the solder portion 30, which is an overheat prevention means, is soldered and connected between the lower one side terminal.

The resistor 11 of the resistors has one common terminal 21 and three selection terminals 22, 23, and 24, and has different resistance values between the terminals 22, 23, and 24. To form a resistance circuit.

Hereinafter, the resistance between the common terminal 21 and the first selection terminal 22 is R3, and the resistance between the first selection terminal 22 and the second selection terminal 23 is R2, the second selection terminal 23 and the resistance. The resistance between the third selection terminals 24 is referred to as R1, and the first, second, and third stages of the rotational speed of the blower motor are from low speed.

That is, when the common terminal 21 and the third selection terminal 24 are selected, the resistance value becomes R1 + R2 + R3, and the resistance value becomes the largest, so that the rotational speed of the blower motor becomes the first stage, which is the lowest speed. When the terminal 21 and the second selection terminal 23 are connected, the resistance value becomes R3 + R2, and the rotational speed of the blower motor becomes two stages, and when connected to the common terminal 21 and the first selection terminal 22, the resistance The value is R3 and the blowing speed is the fastest three stages.

However, in the case of such a conventional resistor, since R1, R2, and R3 are formed on one sheet of metal sheet, as shown, the line width of the resistor 11 is very narrow, and the spacing between circuits is narrow, so that short circuits occur frequently, In addition, the strength was also difficult to make a lot of difficulties.

That is, in order to have a resistance value within a limited area as shown in FIGS. 7C and 12B of the accompanying drawings, an extremely narrow line width is provided in the case of R1 as indicated by " a "

(R: resistance, ρ: intrinsic resistance, A: cross-sectional area, L: circuit length)

Since the resistance is proportional to the length and inversely proportional to the cross-sectional area, the overheating occurs in the portion (a) having a narrow cross-sectional area, and the heat causes a change in the resistance value, resulting in a resistance value different from that of the design. There was a problem such as an error occurs.

Meanwhile, looking at the heat generated in the circuit through the formula below,

(I: current, R: resistance, T: unit time)

The heat generated in the operation of the resistor (Joule heat) is proportional to the square of the current and is inversely proportional to the circuit cross section as described above. Therefore, in order to reduce the current density per unit area, the width of the circuit can be increased to disperse the generated heat. Circuit and heat dissipation structure should be reflected in the design and manufacture.

In other words, the smaller the width of the thin-film circuit constituting the resistance circuit, the higher the disconnection rate is, so that the more frequent the breakdown, and the wider the width of the thin-circuit circuit, the smaller the disconnection rate is, the more structural changes necessary to improve the line width of each resistor are required. .

Power of each resistor of the resistor shown in FIG. 13 is

Consider that R3 is 10.6W in R1, 18.2W in R2, 30W in R1, 35W in R3 in R2, 60W in R2, 0W in R1, 0W in R3, 140W in R3, and 0W in R2 and R3 respectively. In this case, it can be seen that the amount of power on the R1 and R2 sides is very small compared to R3. The heat dissipation structure that does not consider the amount of heat generated for each resistor in order to dissipate the entire resistor is also an unreasonable structure that causes waste of materials.

Particularly, in the related art, as shown in FIGS. 3 and 4, an overheat prevention means made of a cylindrical temperature fuse has begun to be applied. However, in a resistor of such a structure, welding is performed between resistors in a state where the top of the cover member on the outer side is cut out. Structure, and there is a possibility of short circuit with the inner wall of the heat sink, the distribution of resistance value (R3) is severe, structural complexity, the manufacturing cost is high due to the complexity of the manufacturing process, and the failure rate is also high there was.

In addition, the conventional resistors of copper nickel alloys require a large material cost, and use as a semiconductor material is difficult to apply due to high dispersion, poor temperature characteristics, and poor mechanical strength in film etching and resistance assembly processes. There are also.

The present invention is to reduce the size (area) of the resistor as well as the desired resistance value by separating and stacking the resistor to a plurality of sheet metal sheet to improve the problem of the conventional air conditioner motor resistor, the line width and resistance of the resistor circuit It is an object of the present invention to provide a resistor for an air conditioner fan motor that can prevent a breakdown by reducing a short circuit rate during overheating by ensuring a space between circuits.

The present invention is a simpler resistor structure in which the heat sink is reduced and eliminated on the resistance side with a small amount of power (proportional to heat generation), and the heat sink is concentrated and designed on the R3 side with a large amount of power so as not to have a heat dissipation structure to a portion with low heat generation. The purpose is to provide.

The present invention is superior to copper nickel alloys, requires less material cost, has a low dispersion degree suitable for use as semiconductor materials, has excellent temperature characteristics, and has good mechanical strength in film etching and resistance assembly processes. The purpose is to provide.

The present invention also aims to provide a resistor for an air conditioner motor that realizes the design stability of the assembly configuration of the short circuit prevention means by allowing the overheat prevention short circuit means to be assembled outside the heat sink.

1 is a perspective view of a resistor for a conventional air conditioner fan motor.

2 is an exploded perspective view of a conventional air conditioner fan motor resistor;

3 is a perspective view of another example of a resistor for a conventional air conditioner fan motor;

4 is an exploded perspective view of another example of a resistor for a conventional air conditioner fan motor;

5 is a perspective view of a first embodiment of a resistor for an air conditioner fan motor of the present invention;

6 is an exploded perspective view of a first embodiment of a resistor for an air conditioner fan motor of the present invention;

FIG. 7A shows a resistor of an air conditioner fan motor resistor of the first and second embodiments of the present invention, and FIG. 7B shows a resistor of an air conditioner fan motor resistor of the third embodiment of the present invention, and FIG. 7C shows a resistor for a conventional air conditioner fan motor. Represents a single plate resistor.

8 is a perspective view of a second embodiment of a resistor for an air conditioner fan motor of the present invention;

9 is an exploded perspective view of a second embodiment of a resistor for an air conditioner fan motor of the present invention;

10 is an exploded perspective view of a third embodiment of a resistor for an air conditioner fan motor of the present invention;

11A and 11B are enlarged cross-sectional views illustrating main parts of a resistor for an air conditioner fan motor of the present invention.

12A is a state in which a first resistor and a second resistor of a resistor for an air conditioner fan motor of the present invention are separated, and FIG. 12B is a diagram schematically showing a resistor implemented on a single plate of a resistor for a conventional air conditioner fan motor.

13 is a diagram illustrating a power consumption versus resistance as a representative example of a resistor for an air conditioner fan motor.

※ Explanation of main parts of drawing

100: resistor, 110: resistor

112: first resistor 114: second resistor

116: third resistor 120: insulating material

130: heat sink 140: cover member

150: temperature fuse 160: temperature fuse

200: connector

In order to achieve the above object, a resistor for an air conditioner fan motor according to the present invention forms bending protrusions along upper, left, and right edges of a cover member forming an accommodation space, and combines a heat sink with insulating materials and resistors in the inner accommodation space. Alternately stacked resistors; And a lower portion of the power connection terminal is surrounded by a cover member, and an upper portion thereof includes a connector portion in which terminals connected to the resistors are soldered upright.

The resistor portion of the present invention resistor is preferably a resistor that combines one independent resistor and two resistors having a small resistance value.

The resistor of the present invention may form a multilayer in three layers by separately separating the resistors.

The material of the resistor of the present invention resistor is preferably an iron-nickel alloy.

The resistor for the air conditioner fan motor of the present invention preferably further includes a temperature fuse short-circuited to protect the internal circuit during overheating through the resistor.

The resistor for an air conditioner fan motor of the present invention has a feature in that a resistor for an air conditioner fan motor including a connector part and a resistor part is formed in an alternating layer with an insulating material interposed therebetween.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a perspective view of a first embodiment of the present invention air conditioner fan motor resistor, Figure 6 is an exploded perspective view of a first embodiment of the present invention air conditioner fan motor resistor, Figure 7a is a present invention air conditioner fan motor resistor Fig. 11A is a schematic cross-sectional view of a resistor for an air conditioner fan motor of the present invention.

The resistor of the first embodiment of the present invention air conditioner resistor according to the drawings is largely composed of a resistor portion 100 and a connector portion 200.

The resistor unit 100 includes a heat sink 130, an insulating material 120, and a resistor 110.

Among them, the resistor 110 includes the first resistor 112 having the smallest resistance value R3 and the third resistor having the largest resistance value R1 at the second resistor 114 having the intermediate resistance value R2. 116 may be combined.

The cover member 140 forms a support angle 142 at both lower ends, and an inner side forms a receiving space 141, and bends 144 along the upper, left, and right edges of the receiving space 141. Form them.

The heat sink 130 forms a plurality of heat radiation fins 132 to the outside.

The insulating material 120 may include a first insulating material 122 having one side in contact with the inside of the cover member 140, a second insulating material 124 interposed between the resistor 112 and the resistors 114 and 116, and a resistor ( And a third insulating material 126 positioned between the 114 and 116 and the heat sink 130.

Since the specific structure of the connector part 200 is known a lot, the specific structure is omitted.

The assembly of the subject innovation of the present invention, in order from the inner receiving space 141 of the cover member 140 formed with the support angle 142 on both lower ends, the first insulating material 122, the first resistor 112, After stacking the second insulating material 124, the second resistor 114 and the third resistor, the third insulating material 126, and the heat sink 130, the bending protrusions of the cover member 140 ( 144 may be folded to couple the heat sink 130.

In this case, it is preferable to form an extension as well as an insulation material for the insulation of the separated resistors.

The reason why the third resistor R3 is stacked only on the heat sink 130 is that the third resistor R3 always generates current by generating current and generates the most heat regardless of any selection terminal.

In addition, it is preferable that such a resistor uses an iron-nickel alloy having a lower resistance change rate with temperature, superior in strength, and lower cost than a copper nickel alloy used in the related art.

8 is a perspective view of a second embodiment of a resistor for an air conditioner fan motor of the present invention, FIG. 9 is an exploded perspective view thereof, and its cross section is the same as that of FIG. 11A which is a cross-sectional view of the first embodiment, and the structure of the resistor is first. 7A shows an embodiment.

According to the drawings, the resistor of the second embodiment of the present invention also includes a resistor part 100 and a connector part 200.

The resistor unit 100 includes a heat sink 130, an insulating material 120, a resistor 110, a cover member 140, and a temperature fuse 160 that is an overheat prevention means.

The resistor 110 includes an independent first resistor 112, a combined second resistor 114, and a third resistor 116, and the cover member 140 has a support angle 142 at both lower ends thereof. The inner side forms an accommodating space 141, and forms bending protrusions 144 along the upper, left, and right edges of the accommodating space 141, and the heat dissipating plate 130 radiates outwardly of the heat dissipating fin 132. The insulating material 120 is formed of many, the first insulating material 122 having one side in contact with the inside of the cover member 140, and the second insulating material 124 interposed between the resistor 112 and the resistors 114 and 116. ) And a third insulating material 126 positioned between the resistors 114 and 116 and the heat sink 130.

In particular, the temperature fuse 160 is disposed outside the heat sink 130 to have a closed circuit configuration as follows. That is, the upper ring-shaped terminal, which is the temperature fuse input terminal, is coupled to the upper portion of the heat sink 130 as the bolt 132 (power supply is possible), and the output terminal of the resistor 112 is connected to the lower end of the heat sink 130 with the bolt 132. The output terminal of the temperature fuse 160 is connected to the terminal of the connector 200 so that a closed circuit is formed from the first terminal of the connector 200 through the resistors, the heat sink 130 and the temperature fuse 160 to the other terminal of the connector. Achieve.

As described above, the assembly of the subject innovation has a first insulating material 122, a first resistor 112, and a first insulating material 122 in the inner receiving space 141 of the cover member 140 having the support angles 142 formed at both lower ends thereof. A second insulating material 124, a resistor in which the second resistor 114 and the third resistor are combined, a third insulating material 126, and a heat sink 130, and then the bending protrusion 144 of the cover member 140. ) And the heat sink 130 are coupled to each other, and the upper end of the temperature fuse 160 having a ring-shaped contact is connected to the previously formed connection hole 131 by using the bolt 132.

10 is an exploded perspective view of a third embodiment of a resistor for an air conditioner fan motor of the present invention, and FIG. 7B is an exploded plan view of a resistor of a third embodiment of a resistor for an air conditioner fan motor of the present invention, and FIG. A schematic sectional view of a third embodiment of a motor resistor.

The resistor for the present invention air conditioner fan motor according to the drawings is composed of a resistor unit 100 and a connector unit 200.

The resistor unit 100 includes a heat sink 130, an insulating material 120, a resistor 110, and a cover member 140.

In the present embodiment, the resistor 110 is independently separated from the first resistor 112, the second resistor 114, and the third resistor 116, and the cover member 140 is supported at both lower ends. An angle 142 is formed, and an inner side forms an accommodating space 141. The bent protrusions 144 are formed along upper, left, and right edges of the accommodating space 141, and the heat sink 130 is formed on an outer side thereof. As a result, a plurality of heat dissipation fins 132 are formed.

In particular, the insulating material 120 may include a first insulating material 122 having one side in contact with the inside of the cover member 140, a second insulating material 124 interposed between the resistor 112 and the resistor 114, and The third insulating material 126 is interposed between the resistor 114 and the resistor 116 and the fourth insulating material 128 positioned between the resistor 116 and the heat sink 130.

12A schematically shows a state in which a first resistor and a second resistor of the present invention air conditioner fan motor resistor (example of one-stage circuit) are separated, and FIG. 12B is implemented on a single plate of a conventional air conditioner fan motor resistor. FIG. 13 is a diagram schematically showing the resistors, and FIG. 13 is a chart showing power consumption versus resistance of a resistor for an air conditioner fan motor.

As shown in these figures, the resistor 110 is composed of two independent resistors, or three independent resistors, and is laminated with a separate insulating material interposed therebetween. Since the most power consumption is achieved in one resistor (R3), the heat generation is also the highest, so that the resistor (R3) is intensively dissipated, so that it is not necessary to arrange heat sinks on both sides of the resistor as in the prior art.

In addition, in the related art, as shown in FIGS. 7C and 12B, the entire area of the resistor is increased by forming all of the resistors on one metal sheet, so that the line width of the resistor 116 is relatively thin. In the third embodiment, the resistor 116 and the resistor 114 are stacked independently of each other to expand the line width, thereby increasing the line width strength of the resistor. The disconnection due to overheating is reduced, and similarly, in the embodiments 1 and 2 of the present invention, even though the resistors 114 and 116 are combined and laminated differently from the resistor 112, the line width becomes wider than that of the conventional single plate resistor. As a result, breakdown failure is reduced when overheated.

1) When the resistor is in operation, the resistance is as shown below.

(R: resistance, ρ: intrinsic resistance, A: cross-sectional area, L: circuit length)

Proportional to the length and inverse to the cross-sectional area,

2) Looking at the heat generated in the circuit through the formula below,

(I: current, R: resistance, T: unit time)

Joule heat generated during operation is proportional to the square of the current and inversely proportional to the circuit cross-sectional area.

Therefore, in order to reduce the current density per unit area, it is necessary to increase the width of the circuit to dissipate the generated heat. However, in the part having a narrow cross-sectional area, the overheating occurs and the heat causes a change in the resistance value, which is different from the resistance value of the design. There are many problems, such as the operation error caused by the value, but the resistor of the present invention is independently separated, so that the line width can be widened, so that the overheating is reduced compared to the conventional resistance, thereby reducing the malfunction due to the variation of the resistance value. do.

The resistor for an air conditioner fan motor of the present invention is similar to that of a conventional resistor, but the number of insulating materials increases as the number of resistors increases. However, since the stacking is performed, the area of the resistor is reduced, thereby reducing the size of the resistor in which the heat sink 13, the cover member 14, and the insulating material are stacked, reducing the weight, and reducing the material cost. Is also saved.

The present invention implements a resistor by using a plurality of metal thin plates as resistors, thereby securing a line width of the resistor and a gap between circuits. Therefore, the current is concentrated in a specific part, and the phenomenon of overheating and short-circuit can be prevented, and also the mechanical strength is secured due to the expansion of the line width and the increase in thickness.

In addition, securing the mechanical strength has the effect of reducing the error rate in the production process by reducing the error occurring in the assembly process.

In addition, by forming the resistors in a stack type, the size of the individual resistors is reduced, and accordingly the size of the heat sink and the insulation plate can be reduced, so that the overall size and weight of the resistor can be reduced, and the cost reduction effect due to the reduction of the material cost can be achieved. Will be imported.

On the other hand, by forming a resistor with an iron-nickel alloy having a low rate of change of resistance with temperature, there is an effect of providing a resistor that is not affected by temperature changes.

The present invention connects the inner resistor (R3) output terminal and the lower end of the heat sink with the cover member at the outside of the heat sink by bolt assembly, and connects one end of the temperature fuse to the upper end of the heat sink and connects the temperature fuse which is an overheat prevention means to the connector part outside the heat sink. In addition, the structure of the resistor having a temperature fuse and a manufacturing process thereof are further simplified by being connected to a connection terminal at.

Claims (6)

In the resistor for an air conditioner fan motor, Insulation materials 120 are formed in the inner accommodating space 141 while coupling the heat sink 130 by forming the bent protrusions 144 along the upper, left, and right edges of the cover member 140 forming the accommodating space 141. And a resistor unit 100 in which the resistors 110 are alternately stacked; And The lower part is surrounded by a cover member of the power connection terminal, and the upper part includes a connector part 200 in which the terminals 212 and 214 soldered to the resistors 110 are upright. At least two resistors (110) is an air conditioner fan motor resistor, characterized in that alternately laminated with an insulating material (120) interposed. The method of claim 1, The resistor (110) is a resistor for an air conditioner fan motor, characterized in that the resistor (114) (116) consisting of two resistors and a resistor (112) consisting of one resistor. The method of claim 1, The resistor (110) is a resistor for an air conditioner fan motor, characterized in that the three layers of the resistor (112), the resistor (114) and the resistor (116) as three independent resistors. The method of claim 1, A resistor for an air conditioner fan motor, characterized in that the material of the resistors 110 is an iron-nickel alloy. The method of claim 1, The resistor for the air conditioner fan motor further comprises a temperature fuse (160) short-circuited when the internal circuit overheating through the resistor (110). The method of claim 5, One end of the temperature fuse 160 is bolted to the ring terminal from the outside of the heat sink 130 to enable a circuit configuration through the heat sink, the heat sink 130 is the resistor 110 on the cover member 140 side The fixed terminal is connected to the common terminal, the other end of the temperature fuse 160 is connected to the negative terminal of the connector unit 200, the air conditioner fan drive resistor.